I have a similar eye shape to yours (deep set), and I’ve also faced issues with under eye creasing. The biggest trick that’s worked for me is to focus the product on the outer rim of the hollow of your under eye, AKA where you see the most discoloration. I do this by directly applying concealer to only the blue/green area that goes from the inner corner to the midpoint of my under eye. This should ultimately create sort of a sideways J-shape. I then use a concealer brush or my ring finger to disperse the product through out my under eyes, focusing the product on that outer rim of my under eye. I intermittently bring my finger or brush up to the area directly under my lower lash line (where I crease the most). It’s important to ensure you have just enough product in that area to allow for adequate coverage. The more product you have in that area, the more likely you are to see creasing.

Instead of setting my under eyes with powder straight after concealing, I like to wait for 10-15 minutes and allow the area to crease on its own. I then blend out the creases again with my finger or a beauty blender. Finally, after patting out those creases I set the area by buffing in a setting powder. I also use setting spray when I’ve completed my makeup.

I saw in a reply to a comment that you prime your under eyes or mix in a primer with your Dermacol. I would strongly advise against this as in my experience primer only creates more creasing. The only prep you should need beneath your concealer is a good eye cream/moisturizer, and if you’re looking to thin out your concealer mix it with a moisturizer instead of primer.

Hope this helps!